Dear Maclogan, I really don't know what you are talking about. The fact that the cartridge seeks the spindle on a rotating ungrooved LP does not in any way disprove my statement that it is not a good idea to set anti-skate using an ungrooved LP. The skating force is due first and foremost to groove friction (acting in concert with the lack of tangency between the cantilever and the groove). If you don't have grooves, you don't have the skating force that we are interested in canceling. I did not say that there is NO force, just not skating force. On a smooth surface there is still some friction between the vinyl and the stylus tip, and the tip/cantilever are still not perfectly perpendicular to the radius of the LP (what I meant by "tangent"), so yes, there is a centripetal force present. But no groove walls. So, what's the problem? (In fact, skating force is also a centripetal force, just different in magnitude from what you get when there are no grooves, which is my whole point.)
I would not wish to misinform anyone, so if someone sees an error in what I wrote, I am more than happy to acknowledge that and glad to be corrected, if you can convince me.
I would not wish to misinform anyone, so if someone sees an error in what I wrote, I am more than happy to acknowledge that and glad to be corrected, if you can convince me.